Las Vegas, January 10, 2012 â€“Sennheiserâ€™sÂ high-end world has plenty of excitement to offer. At this yearâ€™s Consumer Electronics Show in Las Vegas, the audio specialist is unveiling a set of new premium headphones, the HDÂ 700. These fully open dynamic stereo headphones combine high-end sound with an innovative headphone design.

The ear cups are designed in such a way that the sound waves are directed to the ears at a slight angle. This results in an impressively natural listening experience. The ear cups themselves have a completely open design. This not only ensures a highly transparent sound but also clearly displays the “heart” of these exciting headphones: the 40 mm Duofol transducer. Its powerful neodymium magnet systems guarantee detailed, lifelike audio reproduction from 10 to 42,000 Hz.

Small details for a great sound
â€œTo ensure that the acoustic properties of the headphones are not impaired by any partial vibrations, the transducer is mounted in a high-precision gauze made of stainless steel, as is the case in the HD 800 reference headphones,â€ explained Axel Grell, Senior Acoustic Engineer at Sennheiser. A new patent-pending feature is the special shape of the gauze, which continues the curved lines of the diaphragm. The resulting curvature reduces the volume of air beneath the diaphragm, thus guaranteeing even more precise control of the diaphragm motion and significantly lowering total harmonic distortion.

The Sennheiser HD 700 headphones include a ventilated magnet system (click on image for hi-res).

The endeavour to fully exploit the sound potential of the premium headphones led to a further small but effective innovation: a ventilated magnet system. The idea is actually quite simple. “The up and down motion of the diaphragm produces an air flow in the magnet system housing that causes the diaphragm to wobble slightly,” explained Axel Grell. “By positioning precisely defined holes in the housing directly under the magnets, we can cause the air to flow in a specific direction. This minimises the wobbling motion of the diaphragm.” And the result is impressive: with total harmonic distortion of less than 0.03Â percent (at 1Â kHz and 105Â dB sound pressure level), the HDÂ 700 offers brilliant trebles, precise bass reproduction and a crystal-clear sound. Dips in the bass level are effectively suppressed by the patent-pending multilayer design of the headband.

The new HD 700 will be available in shops from March and carries a street price of $999.95.

Technical Data:

Transducer principle:

dynamic, open

Ear coupling:

circumaural

Frequency response:

10 â€“ 42,000 Hz

Nominal impedance:

150 ohms

Sound pressure level (SPL):

105 dB (1 kHz, 1 V)

Total harmonic distortion (THD):

< 0.03 % (1 kHz, 1 V)

Jack plug:

straight Â¼â€(6.3 mm) stereo

Weight without cable:

approx. 273 g

Cable length:

3 m

The Sennheiser Group, with its headquarters in Wedemark near Hanover, Germany, is one of the worldâ€™s leading manufacturers of microphones, headphones and wireless transmission systems. The family-owned company, which was established in 1945, recorded sales of around â‚¬468 million in 2010. Sennheiser employs more than 2,100 people worldwide, and has manufacturing plants in Germany, Ireland and the USA. The company is represented worldwide by subsidiaries in France, Great Britain, Belgium, the Netherlands, Germany, Denmark (Nordic), Russia, Hong Kong, India, Singapore, Japan, China, Canada, Mexico and the USA, as well as by long-term trading partners in many other countries. Also part of the Sennheiser Group are Georg Neumann GmbH, Berlin (studio microphones and monitor loudspeakers), and the joint venture Sennheiser Communications A/S (headsets for PCs, offices and call centres).

You can find all the latest information on Sennheiser by visiting our website atwww.sennheiser.com.

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